Method for manufacturing packaging body, film for packaging material, and laminated film and packaging material comprising the same

Patent metadata

Field	Value
Publication number	US-2022411153-A1
Application number	US-202017777766-A
Country	US
Kind code	A1
Filing date	Nov 16, 2020
Priority date	Nov 19, 2019
Publication date	Dec 29, 2022
Grant date	—

Abstract

A method for manufacturing a packaging body according to the present disclosure includes the steps of: (A) preparing a packaging material that includes an innermost layer containing a resin composition containing a polypropylene resin and a filler dispersed in the resin composition, a ratio Y/X of an average particle diameter Y μm of the filler to a thickness X μm of the innermost layer being 0.02 to 3.5; (B) producing a packaging body that has the packaging material and an oil-in-water dispersion-type content hermetically housed by the packaging material; and (C) subjecting the packaging body to a heating treatment so as to absorb oil contained in the content into the innermost layer.

First claim

1 . A method for manufacturing a packaging body, the method comprising:
(A) preparing a packaging material that includes an innermost layer containing a resin composition containing a polypropylene resin and a filler dispersed in the resin composition, a ratio Y/X of an average particle diameter Y μm of the filler to a thickness X μm of the innermost layer being 0.02 to 3.5; (B) producing a packaging body that has the packaging material and an oil-in-water dispersion-type content hermetically housed by the packaging material; and (C) subjecting the packaging body to a heating treatment so as to absorb oil contained in the content into the innermost layer.

2 . The method for manufacturing a packaging body according to claim 1 , wherein a lipid content percentage of the oil-in-water dispersion-type content is 0.1% by mass or more and less than 50% by mass.

3 . A film for a packaging material, the film comprising a first resin layer that contains a resin composition containing a polypropylene resin and a filler dispersed in the resin composition, wherein
a ratio Y/X of an average particle diameter Y μm of the filler to a thickness X μm of the first resin layer is 0.02 to 3.5.

4 . The film for a packaging material according to claim 3 , wherein an arithmetic mean roughness Sa of a surface that is a first surface of the first resin layer and constitutes an innermost surface of the film for a packaging material is 0.3 μm or more and less than 1.0 μm.

5 . The film for a packaging material according to claim 3 , wherein a reduced peak volume Vmp of a surface that is a first surface of the first resin layer and constitutes an innermost surface of the film for a packaging material is 0.08 to 0.3 μm 3 /μm 2 .

6 . The film for a packaging material according to claim 3 , further comprising a second resin layer provided on a second surface of the first resin layer.

7 . The film for a packaging material according to claim 3 , wherein the first resin layer further contains at least one additive selected from the group consisting of the following resin materials (i) to (vii):
(i) a block copolymer of polypropylene and polyethylene; (ii) a block copolymer of polyethylene and ethylene-butylene; (iii) a block copolymer of polyethylene and ethylene-octene; (iv) an ethylene-based elastomer; (v) a propylene-based elastomer; (vi) a butene-based elastomer; and (vii) a reactor TPO.

8 . The film for a packaging material according to claim 7 , wherein the first resin layer contains the (v) propylene-based elastomer.

9 . The film for a packaging material according to claim 7 , wherein at least one of a softening point and a melting point of the additive is 130° C. or lower.

10 . A laminated film comprising:
a substrate; and the film for a packaging material according to claim 3 provided on the substrate, wherein the first resin layer is disposed on at least one outermost surface.

11 . A packaging material comprising the laminated film according to claim 10 .

12 . The packaging material according to claim 11 , wherein the packaging material is used in a packaging body in which an oil-in-water dispersion-type content is hermetically housed and which is subjected to a thermal treatment.

13 . The packaging material according to claim 12 , wherein a lipid content percentage of the oil-in-water dispersion-type content is 0.1% by mass or more and less than 50% by mass.

Assignees

• Toppan Inc

Inventors

• Nagai Aki
• Tanaka Ryo
• FUKUTAKE Hitomi
• Wakabayashi Hiroyuki

Classifications

• B65D81/264

  for absorbing liquids · CPC title

• B32B27/20

  using fillers, pigments, thixotroping agents · CPC title

• B32B2307/31

  Heat sealable · CPC title

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title

• C08L23/14

  Copolymers of propene (C08L23/16 takes precedence) · CPC title